Question

question 5
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which of the following muscles/muscle group is primarily responsible for extension of the leg at the knee?
quadriceps femoris muscle group
hamstring muscle group
sartorius
gracilis

Explanation:

The Quadriceps Femoris Muscle Group is located at the front of the thigh. Its main function is to extend the leg at the knee joint. The Hamstring Muscle Group is at the back of the thigh and is mainly for knee flexion. The Sartorius is a long, thin muscle that flexes, abducts, and laterally rotates the hip and flexes the knee. The Gracilis is an adductor of the hip and also assists in knee flexion.

Answer:

Quadriceps Femoris Muscle Group